Symlink node_modules/.cache to tempdir

Co-authored-by: Pavel Busko <[email protected]>

build.go

@@ -14,6 +14,8 @@ import (
 	"github.com/paketo-buildpacks/packit/v2/scribe"
 )
 
+const NODE_MODULES_CACHE = "node_modules_cache"
+
 //go:generate faux --interface BuildManager --output fakes/build_manager.go
 type BuildManager interface {
 	Resolve(workingDir string) (BuildProcess, bool, error)
@@ -134,6 +136,19 @@ func Build(entryResolver EntryResolver,
 					return packit.BuildResult{}, err
 				}
 
+				cacheFolder := filepath.Join(os.TempDir(), NODE_MODULES_CACHE)
+				linkName := filepath.Join(layer.Path, "node_modules", ".cache")
+
+				err = os.Mkdir(cacheFolder, os.ModePerm)
+				if err != nil {
+					return packit.BuildResult{}, err
+				}
+
+				err = os.Symlink(cacheFolder, linkName)
+				if err != nil {
+					return packit.BuildResult{}, err
+				}
+
 				err = linker.Link(filepath.Join(projectPath, "node_modules"), filepath.Join(layer.Path, "node_modules"))
 				if err != nil {
 					return packit.BuildResult{}, err

cmd/setup-symlinks/internal/run.go

@@ -42,7 +42,13 @@ func Run(executablePath, appDir string, symlinkResolver npminstall.SymlinkResolv
 		return err
 	}
 
-	return createSymlink(filepath.Join(layerPath, "node_modules"), linkPath)
+	createSymlink(filepath.Join(layerPath, "node_modules"), linkPath)
+	if err != nil {
+		return err
+	}
+
+	cacheFolder := filepath.Join(os.TempDir(), npminstall.NODE_MODULES_CACHE)
+	return os.Mkdir(cacheFolder, os.ModePerm)
 }
 
 func resolveWorkspaceModules(symlinkResolver npminstall.SymlinkResolver, appDir, layerPath string) error {